Non-sifting envelop.



Patented June 27, 1911.

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. earns a NON-SIFTING ENVELOP.

Specification of Letters latent.

Application filed April 3, 1911.

Patented June 27, 1911. Serial No. 618,530.

To all whom it may concern."

Be it known that I, Anoosr P. SPITKO, a citizen of the United States,and a resident of Salt Lake City, in the county of Salt Lake, State ofUtah, have invented a new and useful Improvement in Non- SiftingEnvelops, of which the following is a specification.

My invention is an improvement in the class of envelops designed moreespecially for carrying merchandise, and the object of the invention isto provide means in connection with the envelop for closing the mouththereof in such manner as to prevent the escape of comminuted orpulverulent substances at the ends of the flap, where in the ordinaryform of envelop there is an opening between the sealing flap and theback of the envelop.

In the drawings: Figure 1 is a perspective view of the envelop with thesealing flap closed; Fig. 2 is a similar view of a portion of theenvelop with the flap open; Fig. 3 is a front view of a portion of theenvelop; Fig. 4 is a section on the line l1 of Fig. 3; and Fig. 5 is asectional view showing the sealing flaps partly folded.

In the embodiment of the invention shown the body 1 of the envelop isformed by folding the side edges 2 of the sheet onto the body 1, thesaid edges being connected at the longitudinal center of the body, asindicated at 4. The body is extended beyond the side flaps 2 to form aclosing flap 5, which is turned over on the flaps 2 and 3 and sealed asshown in Fig. 1. At the opposite end of the envelop the side edges orflaps 2 are cut away to leave a single ply flap 6, and a stifieningstrip 7 is superposed on the inner face of the said flap and sealedthereto. The said strip is preferably of thin pasteboard or still paper,and at its center the strip is provided with a downwardly projectingtongue 8 having a transverse opening 9. The flap 6 is cut away at itscenter, as indicated at 10 in Fig. 3, and the flap 6 so formed issecured to the tongue 8.

A fastener is connected with the side flaps 2, the said fastenercomprising a T-shaped plate having its, body 11 provided with tongues 12passed through the flaps and bent over upon themselves to hold the platein place, and a tongue 13. The envelop is transversely creased at 14 tomark the limits of the flap 6 and is also transversely creased at 15.

In using the improved envelop, after the contents have been inserted inthe inclosure, the flap 6 is folded onto the envelop. The crease 15 isso placed that the free edge of the flap 6 registers therewith, and thesaid crease marks the limits of the double flap formed by thesuperposing of the flap 6. on that portion 16 of the envelop between thecreases 14: and 15. The said double flap is now folded onto the body ofthe envelop, and the tongue 13 is passed through the opening 9 of thetongue 8 and is then bent downwardly as indicated in Fig. 4. The tongue13 thus holds the double flap closed. It will be noticed that theenvelop has in fact a sealing flap whose inner portion is a double ply,while its outer portion is a single ply, and the fiap folds by foldingthe single ply onto the double ply and then folding the single ply andthe double ply onto the envelop.

I claim:

1. An envelop comprising a body having a sealing flap at one end, astifiening strip arranged transversely of the sealing flap, said striphaving a lateral tongue provided with a transverse opening atapproximately the center of the strip and extending in the oppositedirection from the flap, said flap being cut away at its center topermit the passage of the tongue, the envelop having a transverse creaseat the junction of the sealing flap therewith, and a second transversecrease spaced apart from the first crease a distance correspondingapproximately to the width of the sealing flap, and forming a doubleflap between the sealing flap and the body of the envelop, and aflexible metallic tongue on the envelop for engaging the opening of thetongue of the stiffening strip.

2. An envelop comprising a body having a sealing flap, a reinforcingstrip arranged transversely of the sealing flap and having a lateraltongue extending in the opposite dimeans on the envelop for holding thetongue rection from the flap, the envelop having a of the reinforcingstrip.

transverse crease at the 'unction of the sealing flap therewith, andhaving a second AUGUST SPITKO' transverse crease spaced apart from thefirst Witnesses:

crease a distance corresponding approxi- LOYAL L. BEYERIDGE,

mately to the Width of the sealing flap, and DOUGLAS A. SWAN.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

